Optical waveguide fiber with titania-silica outer cladding and m

Details Optical waveguide fiber with titania-silica outer cladding and m Optical waveguide fiber with titania-silica outer cladding and m

1991-10-18

1993-01-19

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, 65 33, 65900, C03B 37025

Patent

active

051804115

ABSTRACT:
A method of making an optical waveguide fiber with a fatigue resistant TiO.sub.2 -SiO.sub.2 outer cladding, and a substantially glass blank for drawing into such fiber, wherein a glass soot TiO.sub.2 -SiO.sub.2 outermost layer, with an initial TiO.sub.2 concentration greater than 10.5 wt. %, is deposited on a preform, and the preform is exposed to an atmosphere of chlorine and oxygen at a high temperature, and the resulting TiO.sub.2 concentration in the outermost layer of the TiO.sub.2 -SiO.sub.2 outer cladding of the substantially glass blank is less than the initial TiO.sub.2 concentration. In the glass blank form, the outermost layer includes a substantial volume percentage of crystalline phases and in the fiber form, the outermost layer includes inhomogeneities.

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